Severe Aortic Regurgitation and Ascending Aneurysm in a Patient with Pentacuspid Aortic Valve: Case Report and Review.

Pentacuspid aortic valve is an exceptionally rare congenital anomaly that is often associated with functional deterioration and aortopathy. We report a case of a 39-year-old male presenting with severe aortic regurgitation and an ascending aortic aneurysm in the setting of a pentacuspid aortic valve. The patient underwent a successful Bentall and hemiarch replacement using a composite mechanical valved conduit. This case emphasizes the potential association between rare aortic valve morphologies and ascending aortic pathology and includes a brief review of the existing literature on the pentacuspid aortic valve.